package com.pleasure.gm.criminalintent;

import android.content.Context;
import android.hardware.Camera;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;

import java.io.IOException;
import java.util.List;


/**
 * A simple {@link Fragment} subclass.
 * Activities that contain this fragment must implement the
 * {@link CrimeCameraFragment.OnFragmentInteractionListener} interface
 * to handle interaction events.
 * Use the {@link CrimeCameraFragment#newInstance} factory method to
 * create an instance of this fragment.
 */
public class CrimeCameraFragment extends Fragment {
    // TODO: Rename parameter arguments, choose names that match
    // the fragment initialization parameters, e.g. ARG_ITEM_NUMBER
    private static final String ARG_PARAM1 = "param1";
    private static final String ARG_PARAM2 = "param2";

    // TODO: Rename and change types of parameters
    private String mParam1;
    private String mParam2;

    private OnFragmentInteractionListener mListener;

    private static final String TAG = "CrimeCameraFragment";
    private Camera mCamera;
    private SurfaceView mSurfaceView;

    public CrimeCameraFragment() {
        // Required empty public constructor
    }

    /**
     * Use this factory method to create a new instance of
     * this fragment using the provided parameters.
     *
     * @param param1 Parameter 1.
     * @param param2 Parameter 2.
     * @return A new instance of fragment CrimeCameraFragment.
     */
    // TODO: Rename and change types and number of parameters
    public static CrimeCameraFragment newInstance(String param1, String param2) {
        CrimeCameraFragment fragment = new CrimeCameraFragment();
//        Bundle args = new Bundle();
//        args.putString(ARG_PARAM1, param1);
//        args.putString(ARG_PARAM2, param2);
//        fragment.setArguments(args);
        return fragment;
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        if (getArguments() != null) {
            mParam1 = getArguments().getString(ARG_PARAM1);
            mParam2 = getArguments().getString(ARG_PARAM2);
        }
    }

    @Override
    @SuppressWarnings("deprecation")
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {

        View v = inflater.inflate(R.layout.fragment_crime_camera, container, false);

        Button btnTake = (Button) v.findViewById(R.id.crime_camera_takePictureButton);
        btnTake.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                getActivity().finish();
            }
        });

        mSurfaceView = (SurfaceView)v.findViewById(R.id.crime_camera_surfaceView);
        final SurfaceHolder surfaceHolder = mSurfaceView.getHolder();
        surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
        surfaceHolder.addCallback(new SurfaceHolder.Callback() {
            @Override
            public void surfaceCreated(SurfaceHolder holder) {
                if (mCamera != null) {
                    try {
                        mCamera.setPreviewDisplay(holder);
                    } catch (IOException e) {
                        Log.e(TAG, "Error setting up preview display", e);
                    }
                }
            }

            @Override
            public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
                if (mCamera == null) return;
                ;
                Camera.Parameters parameters = mCamera.getParameters();
                Camera.Size s = getBestSupportedSize(parameters.getSupportedPictureSizes(),width,height);
                parameters.setPreviewSize(s.width, s.height);
                mCamera.setParameters(parameters);
                try {
                    mCamera.startPreview();
                }catch(Exception e){
                    Log.e(TAG,"Could not start preview",e);
                    mCamera.release();
                    mCamera = null;
                }

            }

            @Override
            public void surfaceDestroyed(SurfaceHolder holder) {
                if (mCamera != null)
                    mCamera.stopPreview();
            }
        });
        return v;
    }

    private Camera.Size getBestSupportedSize(List<Camera.Size> sizes,int width,int height){
        Camera.Size bestSize = sizes.get(0);
        int largestArea = bestSize.width * bestSize.height;

        for (Camera.Size s:sizes) {
            int area = s.width * s.height;
            if(area > largestArea){
                bestSize = s;
                largestArea = area;
            }

        }
        return bestSize;
    }

    @Override
    public void onAttach(Context context) {
        super.onAttach(context);
        if (context instanceof OnFragmentInteractionListener) {
            mListener = (OnFragmentInteractionListener) context;
        } else {
            throw new RuntimeException(context.toString()
                    + " must implement OnFragmentInteractionListener");
        }
    }

    @Override
    public void onDetach() {
        super.onDetach();
        mListener = null;
    }

    /**
     * This interface must be implemented by activities that contain this
     * fragment to allow an interaction in this fragment to be communicated
     * to the activity and potentially other fragments contained in that
     * activity.
     * <p/>
     * See the Android Training lesson <a href=
     * "http://developer.android.com/training/basics/fragments/communicating.html"
     * >Communicating with Other Fragments</a> for more information.
     */
    public interface OnFragmentInteractionListener {
        // TODO: Update argument type and name
        void onFragmentInteraction(Uri uri);
    }



    @Override
    public void onResume() {
        super.onResume();

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.GINGERBREAD){
            mCamera = Camera.open(0);
        } else {
            mCamera = Camera.open();
        }
    }

    @Override
    public void onPause() {
        super.onPause();

        if(mCamera != null){
            mCamera.release();
            mCamera = null;
        }
    }
}
